All way cutting machine



April 17, 1934. A 1 SWEET ET AL ALL WAY CUTTING MACHINE Filed Nov. 29,1930 2 Sheets-Sheet 1 n n mm mN NM LILJ ieZcZ Apsrfii 17, 1934. A SWEETET AL ALL WAY CUTTING MACHINE Filed Nov. 29, 1930 2 Sheets-Sheet 2Patented Apr. 17, 1934 UNITED STATES PATENT OFFIQE AlbertLeverett Sweetand Charles L. Field, Yakima, Wash.

Application November 29, 1930, Serial No. 498,980

15 Claims.

This invention relates to cutting machines designed for the purpose ofcutting ornamental and other designs through such materials as paper,sheet metal, leather or wood and particularly to machines of thischaracter in which the cutting is performed by a reciprocating cuttingknife acting as a combination chisel and knife cutter.

A further object is to provide a machine of this character which is verysimple, readily operated and which is compact and portable and whichwill either cut straight downward in a plane perpendicular to the planeof support or on any desired bevel up to 45 and in which the cuttingknife may be guided along any given straight line, curve or circle.

A further object is to provide a machine of this character in which thedepth of cut may be adjusted and which is operated by an electric motor.

29 The invention is illustrated in the accompanying drawings, wherein:--

Figure l is a vertical sectional view of our improved cutting machine,the motor casing being in elevation;

Figure 2 is a section on the line 22 of Figure 1;

Figure 3 is a section on the line 33 of'Figure 1;

Figure 4 is a section on the line 4-4 of Figure 3;

Figure 5 is an under side view of the base of the machine, and

Figure 6 is a side elevation of the cutting knife and chuck therefor,the chuck being partly broken away.

Referring to these drawings, it will be seen that this machine ismounted upon a base 10, the under face of which is shown in Figure 5.This base at one end is provided with the up- 40 wardly projecting stud11 having a knob-like handle 12, the other end of the base being cutaway at its middle as at 13. The under face of the b se is formed withthe longitudinal grooves 14. Extending upward from the base is the shorta bearing 15 upon which the remainder of the mechanism is mounted.Disposed to embrace this bearing is a supporting block 16 which extendsdown at the forward and rear ends of the bearing and through this blockpasses the tapering pin 17 which is screw-threaded at one end forengagement with the nut 18. By loosening this nut, the block 16 may beoscillated in one direction or the other and then by tightening: up thisnut, the block may be held in its angularly adjusted position.

Mounted upon this block and supported thereby is a motor casing 18, thisbeing held upon the block by screws 19. This casing at one end is closedby a detachable head 20 and through this head passes the motor shaft 21'mounted in bearings in the rear end of the motor casing and in the head20. This motor shaft carries upon its end the crank disk 21. Disposedupon the head 20 is a cutter carrying head 22 rectangular in elevationhaving its rear wall provided with a central opening through which thehub of the head 20 passes and through which the shaft passes. This head22 is hollow and is held to the head of the motor casing by means of thescrews 23. The outer face of this head 22 is closed by a plate 24 heldin place by two screws 25. By removing one of these screws, the plate 24may be turned upon the other screw to disclose the in terior of the head22.

Operating within the head 22 is a slide or yoke 26 which has a lengthequal to the interior width of the head 22 and at one end has anoutwardly projecting flange or rib 2'7 which extends through a slot 28formed in one side wall of the head 22. Thus this slide 26 is guided formovement parallel to the length of the head. The slide 26 is formed withan opening 28 through which the upper section 29 of a reciprocatable rodor cutter shank passes. The wall of this opening 28 is split at 30 tothe side of the slide and the clamp screw 31 passes through the materialon one side of this slit and into the material on the other side of theslit whereby the cutter shank may be clamped within the slide. Theopening 28 is screw-threaded and the cutter shank 29 is screw-threadedso that by rotating the shank, the tool may be raised or lowered. Therear face of the slide 26 is formed with the transversely extendingarcuate groove 32. The crank disk 20 has an outwardly projecting pin 33carrying a roller 34 which operates within this arcuate groove 32; Itis, of course, obvious that. as the motor shaft is rotated, the crank 21will cause a reciprocating motion to be transmitted to the slide or yoke26 and this will be transmitted to the cutter shank and cutter. Thecutter shank and'cutter are constructed as shown in Figure l of an uppersection 29 previously referred toand a lower section 35. The uppersection is screw-threaded at 36 to engage with the interiorscrew-threads of the opening 28. This upper section at its lower end hasswiveled engagement with the section 35, the upper section to this endbeing formed with the bulbous head37 insertable into a socket in thelower section, there being a pin 38 extending through the socket andengaging the constricted neck of this head 37. Thus the upper section 29may be rotated relative to the lower section 35. This lower section 35is provided upon its exterior face with the longitudinally extendinggroove 39. The upper end of the upper section 29 extends through anopening in the upper end of the head 22 and into a removable tubular cap40. The lower section extends through a bushing 41 which hasscrew-threaded engagement with the wall of an opening in the lower endof the head 22, this bushing having a knurled head 42 whereby it may berotated and having an inwardly projecting pin 43, the inner end of whichengages within the groove 39, thus preventing any rotation of the lowerend of the tool spindle or shank but permitting the reciprocation ofthis shank. The bushing 41 is held in place on the inside of the head 22by means of a lock nut 44. Extending through the lock nut 44 is a setscrew 45. This structure provides for a rotative adjustment of thebushing 41 and of the lower section 35 of the cutter shank. By looseningthe lock nut 44, one quarter of a turn on the bushing, and then holdingthis look nut in its loosened position by the set screw, the lowersection 35 is free to rotate with the bushing 41 to set the cuttercarried by this lower section 35 at any desired angle. Then by againloosening the set screw 45 and tightening the nut 44, the bushing 41will be locked in this adjusted position. Where beveled cutting is to bedone, the lower section 35 should always be adjusted with the cuttingtool disposed in a plane parallel to the length of the machine. Thelower end of the section 35 is split or otherwise formed to provide achuck 46, this chuck being contractible by means of the usual cap nut 47and adapted to eral edges 50.

Preferably the forward end of the large fiat base 10 is provided withthe two handles 51 having the form or" plane handles extending upwardand slightly rearward.

In the use of this machine, when it is desired to cut vertically and noton a bevel, the cutter blade 48 may be disposed in any desired plane,either a plane at right angles to the length of the machine or a planeparallel to the length of the machine or in intermediate plane by 7loosening the collar or nut 44 and rotating the bushing 41 with thelower section 35 of the shank and then again locking the bushing fromrotation by means of the lock nut 44. If it be desired to adjust theshank vertically with relation to t -e head 22, the face plate 24 may beswung to an open position and then the shank section 29 rotated to raiseor lower the shank section through the screw-threaded aperture 28, thescrew 31 being first loosened.

The cap or housing 40 constitutes a bearing or guard for the uppersection of the shank. This housing is removed when adjusting the cutterstroke. When it is desired to cut on a bevel, the lower section of theshank is rotatably adjusted until the flat face of the cutter isdisposed parallel to the length of the machine. Then the nut 18 isloosened and the motor supporting block 16 oscillated upon the pin 17 tothe desired angle as shown in Figure 2 and then the nut 18 is againtightened, holding the block and motor in this position with the shankand the cutter disposed at an angle to the vertical plane. The wholestructure is designed to be moved over the work, the cutter followingthe line of the design and the out being made obviously by thereciprocating movements of the cutter. The cutter is so formed as toleave a clean, smooth and precise edge on all the material cut. This isdue to the particular shape of the cutter. The cutting blade cutsthrough material on a down stroke while the edges of the cutter beingrounded exert a shearing stroke on the material, thus leaving a clean,smooth edge. This device may be used with a template as a guide or maybe caused to follow the line of the design. While we have illustrated acertain embodiment of our invention, we do not wish to be limitedthereto as it is obvious that many changes might be made therein withoutdeparting from the spirit of the invention as defined in the appendedclaims.

Having thus described the invention, what is claimed as new is:

1. A cutting device, comprising, in combination with a frame; areciprocable rod being so attached to the frame that it can be adjustedto Various angular positions on it; a ram knife attached to the free endof said rod; and means for reciprocating the said rod.

2. A cutting device, comprising, in combination with a frame, a casingsupported by the frame and being so attached to it that it can beadjusted to various angular positions, an electromotor located in saidcasing, a reciprocable rod attached to said casing, a ram knife attachedto the free end of said rod, and means for transmitting the rotarymotion of said motor into reciprocating motion of said rod with itsknife.

3. A cutting device, comprising, in combination with a frame, an axlecarried by said frame, a casing carried by said axle and being turnablethereon, an electromotor located in said casing, a reciprocable rodattached to said casing, a ram knife attached to the free end of saidrod, and means for transmitting the rotary motion of said motor intoreciprocating motion of said rod with i its knife.

4. A cutting device including a base, a support pivotally mounted on thebase for movement around a horizontal longitudinal axis, means forholding the support in adjusted position around support, a crank mountedthereon, a reciprocatable yoke having a transverse slot with which thecrank engages to reciprocate the yoke, guides within which the yokereciprocates, and a ram knife attached to a, shank engaged by andreciprocated by said yoke.

6. A cutting device including a base, a support mounted on the base foradjustment around a horizontal axis on the base, a driving shaft mountedon the support and having a crank thereon, a hollow head mounted uponthe support for adjustment therewith and into which the crank projects,a yoke mounted for reciprocation within the head, the yoke having atransversely extending groove with which the crank pin engages, and aram knife attached to a shank exa... no

tending through the upper and lower ends of the head and extendingthrough said yoke.

7. A cutting device including a base, a support pivotally mounted on thebase for adjustment around a horizontal axis, a driving shaft carriedupon said support and having a crank at one end, a hollow headoperatively mounted upon the support for adjustment therewith and intowhich the crank projects, a yoke mounted within said head forreciprocating movement and having a slot with which the crank pinengages, a ram knife attached to a shank extending through the upper andlower ends of the head, the shank extending through and havingscrew-threaded engagement with the yoke whereby as the shank is rotatedin one direction or the other, the shank will be vertically adjustedrelative to the yoke, the shank being composed of two sections havingswiveled engagement with each other, the lower section carrying the ramknife, and means for holding the lower section from rotation relative tothe head.

8. A cutting device including a base, a sup port pivotally mounted onthe base for adjustment around a horizontal axis, a driving shaftcarried upon said support and having a crank at one end, a hollow headoperatively mounted upon the support for adjustment therewith and intowhich the crank projects, a yoke mounted within said head forreciprocating movement and having a slot with which the crank pinengages, a ram knife attached to a shank extending through the upper andlower ends of the head, the shank extending through and havingscrew-threaded engagement with the yoke whereby as the shank is rotatedin one direction or the other, the shank will be vertically adjustedrelative to the yoke, the shank being composed of two sections havingswiveled engagement with each other, the lower section carrying the ramknife,

and means for holding the lower section from rotation relative to thehead comprising a bushing rotatably mounted within the lower end of thehead and through which the lower section of the shank passes, thebushing and shank having sliding non-rotative engagement with eachother, and means for clamping the bushing against rotation within thehead, said means permitting the bushing to be adjusted to adjust thelower section of the shank.

9. A cutting device including a base, a motor support mounted on thebase for adjustment around a horizontal axis on the base, a motor on thesupport and having a longitudinally extending shaft, a crank thereon, ahollow head mounted upon the casing of the motor within which the crankprojects, a yoke having sliding engagement with the head forlongitudinal movement, the yoke having a transversely extending upwardlycurved arcuate groove in one face and with which the crank pin of thecrank engages, the yoke having a screw-threaded aperture, a tool shankformed in two sections, the upper section being swiveled to the lowersection, the upper section having screw-threaded engagement with theaperture in the yoke and extending upward through the upper end of thehead, means for locking the upper section of the shank in any adjustedposition in the yoke, a bushing in the lower end of the head and throughwhich the lower section of the shank passes, the lower section of theshank and said bushing having non-rotative sliding engagement with eachother, the bushing being rotatably adjustable in the head, means forlocking the bushing from rotation after adjustment, and a cutterdetachably carried by the lower section of the shank.

10. In a cutting device of the character described, a reciprocatable ramknife, the lower edge of the knife being sharpened and at right anglesto the longitudinal axis of the knife, the lateral edges of the knifebeing outwardly and upwardly curved and then inwardly and upwardlycurved, said curved edges being sharpened.

11. A cutting device of the character described including a frame, areciprocatable rod mounted on the frame for adjustment to variousangular positions, and a ram knife attached to the free end of said rod,the ram knife being rotatively adjustable axially of said rod.

12. A cutting device including a base adapted to rest flat against thework to be cut and having a handle whereby it may be pushed and guided,a motor support mounted on the base whereby the motor support may betilted in one direction or the other, a reciprocatable cutteroperatively mounted on the motor support for movement therewith, andmeans operated by the motor for reciprocating said cutter.

13. A cutting device including a base adapted to rest fiat upon the workand having handles whereby it may be guided over the work, a motorsupport pivotally moimted upon the base for tilting movement in one orthe other direction, a motor mounted upon said support and having ashank, a head carried by the casing of the motor, a reciprocatablecutter shank mounted in said head, means engaged by the motor shank forreciprocating said cutter shank, a ram knife carried by the lower end ofthe cutter shank, and means whereby the ram knife may be adjusted into aposition with its edge at right angles to the motor shaft or parallel tothe motor shaft or into any intermediate position, the cutter having aflat chisel edged blade.

14. A cutting device including a base, a support mounted on the base, adriving shaft mounted on the support and having a crank thereon, ahollow head mounted upon the support, into which the crank projects, ayoke mounted for reciprocation in the head with which the crank pinoperatively engages, and a ram knife having an attached shank formed intwo sections having swiveled engagement with each other, the shankextending through the upper and lower ends of the head and the uppersection of the shank having screw-threaded engagement with the yokewhereby the shank of the ram knife may be adjusted through the yokewithout rotating the ram knife.

15. A cutting device including a base, a support mounted upon the base,a driving shaft mounted on the support, a hollow head mounted upon thesupport, a yoke mounted for vertical reciprocation within the head, ashaft extending into said head and carrying means engaging the yokewhereby the yoke shall be reciprocated upon a rotational movement of theshaft, a ram knife having an attached shank extending through the upperand lower ends of the head and extending through said yoke, the yokehaving a central passage for the shank of the ram knife and being split,the split extending into said passage, and means for adjusting the wallson each side of said split portion toward or from each other to therebyclamp the shank to or unclamp it from the yoke.

ALBERT LEVERETT SWEET. CHARLES L. FIELD.

